Symmetrical piling made of channel-iron sections



Em. E.; FEEL. K. scHRoEDER 1,834,744

SYMMETRICAL FILING MADE OF CHANNEL IRON SECTIONS Filed June 24, 1930 Illlllll 111111,"-

@atente lec. i931 iran STATE-s KURT scnaonnma; or DORTMUND, GERMANY SYMMETRICAL PIID'G MADE 0F CHANNEL-IRON SECTION B Application led June 24, 1930, Serial No. 463.415, and iny Germany June 24. 1929.

Colfer dams or pilings consisting of channel-iron sections are well known. The chanl nel sections, however, have not heretofore had their interlocking edges shaped symmetrical.

ly with reference to a common medial plane of the inter-connected walls. Besides, the locks used as connections between the several sections have heretofore generall not been of a double locking character. he present l invention removes these drawbacks by giving to all the assembled pile sections the same dimensions and shape of cross section, and by shaping the inter-engaging locks or joints between the pile sections so as to be substanl5 tially symmetrical with reference to broken lines :v-rv which represent medial planes common to each pair of interlocked wall portions. The best form of apparatus, at present known to me, embodylng my invention, is

shown in the accompanying sheet of drawings, in which Fig. 1 is a plan view of a portion of a piling assembly, and

Fig. 2 is a detail, vhorizontal section 3 through one of the joints shown on an enlarged scale. Y

f Throughout the drawings like reference characters indicate like parts.

S, S, represent channel-iron sections, the adjacent walls W, W, of which are inter-connected, each pair of such connected walls and the joint or lock uniting them, generally represented by a, having one and the same medial lane, represented by a broken line :v -w.

3" his joint or lock a, as shown by Figs. 1 and -2, consists of a pair of claws, one wing or jaw of each of which ends in a hooklike projection c, whereas the second wing or jaw d projects straight out and cooperates with an oppositely disposed shoulder e on the cooperating pile section edge.k Hooks or clawsA4 c on each abutting wall edge are of corresponding form and shape, each nesting in a groove b in the adjoining section so that a symmetrical double locking joint or lock is obtained, each hook c'of one pile section nesting in a groove Z) under the hook of the other pile section.

Among the advantages ofthe described construction may be noted the elimination of any tendenc to twist apart when lthe joints are subjecte to tension strains, as these can be exerted only along the line of the common medial plane of the oint and of its adjacent wall sections, and t e resisting forces then' developed between the interlocked hooks will be evenly distributed on either side of that line of tension. Also, as all the interlocking surfaces subjected to pressure extend either at right angles to that line of strain, or paral el thereto, there will be no resultant. wedging action. Finally, when the joint is subjected to bending strains, the surfaces e closely abutting at the ends of the second Wings or aws d will firmly resist any turning moment about the axis of the joint, generated by such bending forces. The general medial plane of the entire piling assembly is indicated by the brokeny lline y-y. 70 Having described my invention, I claim: 1. A system of sheet piling comprising, in combination, a plurality of channel sections all having a substantially uniform cross section so as to `be interchangeable, and adapted to be interconnected with their adjacent wall portions lying in common planes extending substantially at right angles to the general plane of the assembled piling, and each section edge being provided with a so groove interlocking with a hook-shaped projection on any adjacent section, said interlocking hooks and grooves being arranged symmetrically with reference to the common medial plane of each pair of abutting section walls; whereby said interlocking wall sections will have no tendency to twist apart when their joints are subjected to tension strains exerted along lines lying in said medial plane.

2. A combination such as defined in claim 1 in which said adjacent wall edges also have Y abutting surfaces located on either side of said common medial plane and of said interlocking grooved and hook-shaped ortions; where y additional `resistanceis a orded to any turning moment exerted about the axis of said interlocked joint.

3. A system ofv sheet piling comprising, in combination, a plurality of pile sections the adjacent portions of which lie in substantial- 1y one and the same lane and are provided with interlocking hoo ed portions located in said plane, and with abutting surfaces dis- 5 posed on either side of said interlocked hooks,

said abutting surfaces extending substantial- 1y at right angles to said lane.

KU RA SCHROEDER. 

